Thursday
August 21, 2014

Homework Help: biology

Posted by jenni on Sunday, May 8, 2011 at 11:03pm.

Would you like to help me answers some of my questions in Biology?

1/ Darwin concluded that the most well adapted individuals in a population will leave the most offspring for future generations. This can be considered a measure of an individual's..
a/ phylogeny
b/ family tree
c/ fitness
d/ trophic success

2/Structures that serve little or no purpose in the organism being considered, but are homologous to important structures in other organisms, are referred to as
a/ analogous
b/ mutations
c/ vestigial
d/ convergent

3/Although they all have different phenotypes, the various breeds of domestic dogs have been selectively bred for specific desiable traits. This human- controlled activity is best described as
a/ natural selection
b/ artificial selection
c/ comparative anatomy
d/ convergent evolution

4/ Which of these interactions affects natural selection?
a/ competition
b/ predation
c/ parasitism
d/ all of these

5/ Natural selection selects for or against...
a/ genotypes
b/ phenotypes
c/ communities
d/ ecosystems

6/ Polyploidy as mechanism of speciation occurs most commonly in which of the following organisms?
a/ plants
b/ molluscs
c/ fungi
d/ salamanders
e/ polychaete worms

7/ Among animals, it is believed that the most common mode of speciation is
a/ sympatric
b/ allopatric
c/ chromosomal
d/ directional
e/ autopolyploidy

8/ A breeder of thoroughbreds selects only the fastest horses for breeding stock. This is an example of artificial _________ selection
a/ frequency- dependent
b/ directional
c/ disruptive
d/ sexual
e/ stabilizing

9/ Species that are only distantly related but occupy similar environments often come to resemble each other through a process known as:
a/ genetic drift
b/ divergent evolution
c/ stabilizing selection
d/ coevolution
e/ convergent evolution

10/ Some animal species found in caves have tiny, nonfunctional eyes. These are BEST described as
a/ analogous structures
b/ homologous structures
c/ vestigial structures
d/ mutations

Thanks so much.

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